Thread: How to keep track of %

I'm trying to make a canteen class that holds water. It holds two quarts of water and two quarts is 100%.

public double maxVolume;
public int percentFull;

Right now the Canteen is empty.

public void Canteen()
{
     percentFull=0;
     maxVolume=0;
 }

And right now I'm trying to make a constructor that specifies the amount of liquid the canteen can hold and specifies the percent full.

public Canteen(double maxVolume, int percentFull) 
{
}

Should I make this second Canteen an integer, a double, or something else? Also, how do I make sure the Canteen never reaches higher than 100%. I'm also curious how I can keep maxVolume and percentFull connected so the % of water is consistent with the number of quarts(2) the Canteen can hold.

What second Canteen? Oh, I think you mean the second Canteen() constructor, right? No, that doesn't quite fit in the question.

Anyway, the Canteen class will have instance variables, maybe some constants. The maxVolume could be a constant, final double MAX_VOLUME. I suggest double so that division to real numbers can be done. The default constructor (no parameters) will set the variables to default values, the second constructor will set the instance variables to the parameter values passed to the constructor.

Why don't you finish sketching out the class and the constructors and come back when you can post that and ask more questions.